基于W粉堆积角的物理试验结果，采用考虑颗粒间黏结力的“Hertz-Mindlin with JKR”接触模型进行W粉堆积角仿真试验，运用 Box-Behnken 法对离散元模型关键参数(包括 JKR表面能、恢复系数、静摩擦系数与动摩擦系数)进行堆积角仿真试验设计。通过对试验结果进行多元回归拟合分析获得了堆积角回归模型，以物理实验获得的堆积角为目标对回归模型进行寻优，得到了模型参数的优化解。以此优化解进行仿真。

Based on the physical test results of the W powder accumulation angle, the "Hertz-Mindlin with JKR" contact model considering the adhesion between particles is used to carry out the W powder accumulation angle simulation test, and the Box-Behnken method is used to determine the key parameters of the discrete element model (including JKR surface energy). , Coefficient of restitution, coefficient of static friction and coefficient of dynamic friction) to carry out the pile-up angle simulation test design. The accumulation angle regression model was obtained through multiple regression fitting analysis of the test results. The regression model was optimized with the accumulation angle obtained in the physical experiment as the target, and the optimized solution of the model parameters was obtained. Use this optimized solution for simulation.